Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

ROSACEAE

ROSE FAMILY

Annual to tree
Leaves simple to pinnately to palmately compound, generally alternate; stipules free to fused, persistent to deciduous
Inflorescence: cyme, raceme, panicle, or flowers solitary
Flower generally bisexual, radial; hypanthium free or fused to ovary, saucer- to funnel-shaped, often with bractlets alternate with sepals; sepals generally 5; petals generally 5, free; stamens (0)5–many, pistils (0)1–many, simple or compound; ovary superior to inferior, styles 1–5
Fruit: achene, follicle, drupe, pome, or blackberry- to raspberry-like
Seeds generally 1–5
Genera in family: 110 genera, ± 3000 species: worldwide, especially temp. Many cultivated for ornamental and fruit, especially Cotoneaster , Fragaria , Malus , Prunus , Pyracantha, Rosa , and Rubus
Reference: [Robertson 1974 J Arnold Arbor 55:303–332,344–401,611–662]
Family description, key to genera by Barbara Ertter and Dieter H. Wilken.

SORBUS

MOUNTAIN ASH

Thomas J. Rosatti

Shrub or tree
Leaves odd-1-pinnate in CA, petioled, deciduous; leaflets generally toothed, terminal sometimes partly fused to uppermost lateral(s)
Inflorescence: panicle, many-flowered
Flower: sepals 5; petals 5; stamens 15–20; ovary generally inferior, styles generally free
Fruit: pome; chambers 1–5, 1–2-seeded
Species in genus: ± 80 species: n temp
Etymology: (Latin: ancient name)
Reference: [Jones 1939 J Arnold Arbor 20:1–43]
Intergrading: native species might all = S. sitchensis.

Native

S. scopulina Greene

Shrub 1–5 m; stem-buds 7–15 mm, sticky, hairs generally sparse, ± marginal, whitish
Leaf: leaflets 9–13, 2–7 cm, lanceolate, oblong, or ovate
Inflorescence: pedicel sparsely hairy
Flower: petals 5–6 mm, ovate to ± round
Fruit 8–10 mm, orange to bright red
Seeds 3.5–4 mm, ovate to oblong, flat, brown
Ecology: Canyons, wooded slopes, moist places, coniferous forests
Elevation: 1200–2800 m.
Bioregional distribution: Klamath Ranges, North Coast Ranges, Cascade Range, High Sierra Nevada, Modoc Plateau
Distribution outside California: to British Columbia, Montana, New Mexico
Varieties intergrade.

Native

var. scopulina


Leaf: leaflets (9)11–13, 2–6 cm, generally lanceolate (oblong); stipules generally not persistent in fruit
Flower: petals ovate
Fruit orange to bright red
Seeds 3.5–4 mm, oblong, light brown
Ecology: Habitats and elevations of sp.
Bioregional distribution: Klamath Ranges, North Coast Ranges, Cascade Range, High Sierra Nevada, Modoc Plateau
Distribution outside California: to British Columbia, Rocky Mtns
Horticultural information: IRR, DRN: 1, 4, 5, 6, 15, 16, 17 &SHD: 2, 7; DFCLT.

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